Plate valve



July 27,- 1926. 1,593,914-

S. B. REDFIELD PLATE VALVE Filed Jan. 9, 1926 INVENTOR c'inowdenB-Refild m5 ATTQR Y Patent ed- July 27,: 1926. y

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This invention relates to valves for air more particularly to an 1m-' compressors but provement in the type late vulve.

art as a disc or ate in guided y mean to the valve bolt and rears Applleatton filed January of valve known to the Heretofore the valve these valves has either been 5 of flexible arms anchored attached to the'valve disc in some manner, or else the valve plate or disc has been desi cut in the valve seat I guide pieces or gned to lie in grooves itself with or without dowel pins. Therciare certain disadvantages to all of these methods, with'resultant leakage and breakage otthe valve-when-it is put into operation, and my invention aims to eliminate these disadvantages by providing aplate valve in which the valve disc is guided by means of small clips and" sp tween the valve The object of to provide a plate valve in whi s eliminated, while other objects tion are to provide a valve in guide plate i of my inven rings preferably interposed beplate and the stop plate.

my invention, therefore, is ch the flexible which the assembly'is extremely simple,

leakage is eli seating mmated by the quick and exact of-the valve when put into operation, and breakageis prevented by dispcns ing with the heretofore vulnerable features in the My invention plateyvalve assembly, such as rivets, welds and the like.

- of elements andfeatures of novelty, set forth in which-'- in the appended claims,

specification and illustrated in the drawings,

described in the elevationin section of the com lete valveassembly,

Flgure 2 is a perspective view of the valve "disc or plate, 7 Figure 3 is'a-perspective view of the valve Y clip which is tion, and Figure Referring to the assembly is shown in A an annular valve stop plate 0 and a washer D, ing held together by anyfor instance, a stud'or seat the main element in my inven- 4' is a perspective view partly in section of this 01' V drawings the usual valve Figure 1 withthe valve plate ordisc B, a

the whole besuitable means, as

The annular valve disc is. in tthe form' of a flat ring adapted to lie over the valve seat able number,

preferaby on a he rtsGin A. liotches' H, c any suitare entail: the valve disc B the outside circumference thus adapted to sists of the combination seat, and when bolt E andthe nut F,

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thereo f. Pockets are formed in the stop plate C to receive coil s gings' .K. Valve clips L seated on the disc preferably consists of small plates with ears or ton 'nos 0 formed at an angle to the cli s to, lit into the notches H in the valve isc-B. The notches H are preferably of rectangular shape as illustrated, although said notches mayv be ofany other'suitable shape, as for. instance, semi-circular, it being understood, of course, that in such case, the ears or tongues 0 be shaped to con A spring'seat or seats P consisting of eglindrical portions preferably raised on't e clip, or, if desired, -"depressions, ma be formed on the said clip. The clips 1 are fit over the valve disc D, the ears 0 having engagement" with the notches-H in the valve wise the coil springsK locatedin the pockets .l arefadapted to engage the spring seat P on the cliXs L. i valve seat stop plate 0 and 'washer D, and not shown in the drawing, in order to insure the valve disc Blbeing re-- turned toits relative position on the valve seat. Recesses O are in this instance formed in the-inner face of the stop plate C to-prevent contact between the clips L and the stop plate when the valve disc is raised from the valve seat A.

In the operation of the device, the springs K-hearing upon the clip L with apredetermined pressure, indirectly bear upon the valve plate 13 and holdit to its seat. pressure in thecompressor' cylinder is suf- 'ficient to overcome the pressure of the springs K-the valve plate B is lifted ofi its the cylinder pressure dcisc returns to its seat. h the tongues or creases, the valve d The cage ment of the clips- L wit notches in the valve disc prevent lateral movement of'the valve disc. This insures the wearing of a so-called seat between the valve disc and the valve seat and eliminat es leakage due to minute aberrations inform' therewith. J

disc B. aLikemaybe usedthe contact surfaces between'the valve disc and the valve seat. The drawings and this specification confine themselves to a plate valve for use as, a discharge valve and also for use with a small compressor. There/is no reason, however, why my inventioncannot be applied to-large plate valves in which there are two or more'concentric circular valve ports an a no proportionate number of springs and clips may be used. In like manner the invention as described and claimed can be applied to an inlet valve, the onl necessary changes in the conversion of the discharge valve hereinbefore described to an inlet valve being the adaptation of the valve seat for reversal in the c linder seat ahd the use of coil springs K with preferab y a small initial tension.

, I claim:

1. An improvement in plate valves for air compressors comprising a valve seat, a stopplate having pockets, a valve disc with notches cut on itscircumference, clips with ears or ton'gues adapted to engage the notches for preventing movement of the clips with respect to ,the valve disc, coil springs in the said pockets of the stop plate for returning and holding the valve disc to the valve seat and spring seats on the said over and upon the ports in the said valve plate, notches in, the circumference, of the said valve disc, clips'having ears or tongues for engagement with the said notches to revent relative movement between said 0 ips and the valve disc, spring seats on the said clips, a stop plate, pocketsin said stop plate,

'andi coil sprm sin said pockets, said springs being adapte to engage the spring seats for pressing the clips downwardly upon the valve disc, and for preventing lateral movement of the valve disc with respect *to the.

valve seat.

In testimony whereof I have signed this specification. I

SNOWDEN REDFIELD. 

